bdosptr()                MS-DOS System Call
 
 #include   <dos.h>
 
 int        bdosptr(dosfun,arg,dosal);
 int        dosfun;                      function number
 void       *arg;                        DX or DS:DX values
 unsigned   dosal;                       AL register value
 
    bdosptr() provides direct access to many of the MS-DOS system calls
    which require a pointer argument.  It invokes the system call
    specified by 'dosfun'.  'arg' specifies the value of register DX in
    small data models, and the DS:DX values used in large data models.
 
    Returns:    The value of AX, if successful.  -1 is returned on
                failure and 'errno' and '_doserrno' are set.
 
      Notes:    In the large data models (compact-, large- and huge-), it
                is important to use bdosptr() instead of bdos() for
                system calls that require a pointer as the call argument.

Seealso:


 bdos() 
 harderr()